Paper-bag machine.



, PATENTE'D FEB. 24, 1903. e. MORTSON. PAPER BAG MACHINE.

APPLICATION FILED OCT. 30, 1900.

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' ,lATE'NTED FEB.'24, 1903;

G. MORTSON. PAPER BAG MACHINE.

APPLICATION FILED 00139, 1900.

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PATENTED FEB. 24, 1903..

MORTSON. PAPER-BAG MACHINE.

' APPLICATION FILED 0013.30. 1900.

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PAPER'BAG MACHINE. APPLICATION FILED OUT. 30, 19Q0.

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'NOQ 721,596.

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G. MORTSON.

PAPER BAG MACHINE.

APPLICATION FILED 0013.30, 1900.

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, U ITED ST TES PATENT, OFFICE.

. A GEORGE MoRTsoN, OF HARTFORD, CONNECTICUT, AssIGNoR TO THE UNION PAPER BAG MACHINE COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF, PENNSYLVANIA.

PAPER-BAG M ACHlN Er SPECIFICATION forming part of Letters Patent No. 72 1,596, dated February 24, 1903.

Application filed October 30 1900. Serial No. 34,937. (No model.)

To aZZ whom, it may concern: I

Be it known that I, GEORGE MORTSON, a citizen of the United States of America, and a resident of the city'and county of Hartford,

and State ofConnecticut, have invented'certain new and useful Improvements in Paper- Bag Machines, of which the foliowinglis a specification. p v Thisinvention appertains to paper-bag mazo chines of the rotary-cylinder class, and relates more particularly to the diamon d-formin g mechanism or those elements of the bagbottom-formingmechanism which are directly instrumental in producing the diamond fold.

One object of the present invention is to provide in a paper-bag machine an improved, simplified, efficient, and rapidlyoperating mechanism or means for'prodncing the truncated diamond on" the bag-bottom-forming 2o endof a tucked paper tube and whereby both plies of the paper tube will be carried forward at the primary transverse folding-line under the secondary transverse folding-line and under the previously-advanced portion of the upper ply of said tube, and to so construct and organize the elementary features of the diamond forming means that those elements which engagethe upper ply of the tube during the advancing'movement of the two plies 3o at-the transverse folding-line underneath said upper ply will have parallel engaging and disengaging movements in lieu of rotative or oscillatory-movements, as heretofore.

A further object of the present invention is to provide in a paper-bag machine improved diamond-forming mechanismembodyingarotary member and a rotary reciprocatory or oscillatory member, one of which members is adapted for bodily movements away from and toward the other and one of which members bottom-forming end of the tube and complete the diamond fold I I 1 With these objectsin view'the invention consists in certain details of construction and in the combination and organization of the several parts of the diamond-forming means, substantially as hereinafter described, and more particularly pointed out in the claims.

In the drawings accompanying and forming part of this specification, Figure 1 is a side elevation of a portion of apaper-bag machine embodying my present improvements, the rotary folding bed or cylinder being shown in full and dotted lines in two extreme positions and the tucker-plate being shown in full and dotted lines in several different positions. Fig. 2 is a front elevation of the parts shown in Fig. 1 as seen from the left in said figure. Fig. 3 is aplan view of a portion of the rotary reciprocatory member which cooperates with the rotary memberof the diamo'nd-form- 7o ing mechanism and shows the tucker-plate in its vertical position, as illustrated in Fig. 1, and the parallel-motion blank-engaging devices areshown in full lines in theiradvanced engaging positions, and one of said devices is shown in its retracted position in dotted lines. Fig. 4 is across-sectional view taken in dotted lines44in Fig. 3 lookingin the direction of the arrow. Fig. 5 is a cross-sectional view taken in dotted lines 5 5 in Fig. 3 looking in the direction of the arrow. Fig. 6 is a side elevation similar to Fig. .1 of a portion of the machine, showing the front and side clips on the V cylinder and the means for actuating said cylinder and clips. Figs. 7 and 8 are plan and cross-sectional views, respectively, of a portion of the cylinder,showing the side clips; and Figs. 9 10, 11 1'2, 13 14, and 15 16 are grouped diagrammatic plan and side views illustrating successive steps in the'ope'ration no of producing the diamond folds, successive groups showing the rotative cylinder and tucker-plate devices in fonrdifferent positions they occupy during the formation and completion of the diamond fold, -the radial dotted lines in Fig. 14 indicating the distance traversed by the cylinder-axis during the oscillatory movement. of the tucker-plate from the position shown in Fig. 12 to that shown in Fig. 14.

Similar characters indicate like parts in all the figures of the drawings.

For convenience only so much of the paperbag machine is shown in the accompanying drawings as is necessary to illustrate the construction, organization, and mode of operation of the particular mechanisms or instrumen talities which are directly involvedin the present invention.

The improvements herein described are especially adapted for use in connection with associative bag forming instrumentalities, such as described, for instance, in Letters Patent of the United States No. 614,123 granted to me November15, 1898, and in the reissue thereof, No. 11,880, dated January 1, 1901, to which reference may be had fora description of the construction, organization, and mode of operation of those elements not herein shown and which will in practice cooperate with myimproved diamond-forming mechanism in the process of making paper bags.

The elements of the paper-bag machine directly involved in the subject-matter of the present invention include in one construction and organization thereof shown in the accompanying drawings a main or stationary frame B of suitable construction, a suitable supplemental frame or cylinder carrier 0, pivotally supported with relation to the main frame for oscillation in a vertical plane, two cooperative and relatively rotative elements or devices, (designated in a general way by D and T, respectively,) one of which, as D, constitutes the folding-bed of the machine and is shown as a cylinder having a shaft journaled in bearings on the free end of the oscillatory frame 0, and which cylinder also has clips for engaging the lower ply of the tubular bag-blank, and the other of which members, as T, embodies a rotary reciprocatory tucker-plate fixed to the central slab portion of a shaft mounted at opposite ends in bearings on the stationary frame and also embodies parallel-motion devices for engaging the upper ply of the tubular bag-blank and cooperates with the cylinder on an oscillatory movement thereof away from the tucker-plate to open and refold the bag-forming end of the blank into diamond form, means for rotating the cylinder or foldingbed, means for oscillating the cylinder, means for imparting rotary reciprocatory movements to the tucker-plate and parallel-motion devices, means for actuating the parallel-motion devices, and means for feeding the tubular blank between the cylinder and tucker-plate, all of which will be hereinafter fully described.

The main frame B (a portion only of which is shown in theaccompanying drawings) comprises, essentially, two uprights 8 and 9, havingsuitablebearings for supporting theshafts and other parts of the different mechanisms, one upright being located at one side the machine and the other at theopposite side and both in practice being bolted to a suitable bed. (Not shown.)

The oscillatory frame 0 preferably comprises two L-shaped brackets or side plates 10 and 12, (shown somewhat in the nature of bell-crank levers,) each having a vertically and a horizontally disposed portion having inwardly-projecting hubs 10 and 12 at the point of intersection of the longitudinal axes of the two angularly-disposed portions, at which point the frame 0 is pivotally supported upon the main driving-shaft 15 of the machine, said shaft being journaled at opposite ends in hearings on the side walls of the main or stationary 'frame B and being in practice provided at one end with a drivingpulley. (Not shown.) Fixed to the drivingshaft 15 is a driving-gear 16, which meshes with the driven gear 17, fixed to the cylindershaft 18, journaled for rotation at its opposite ends in hearings on the vertically-disposed portion of the side brackets 10 and 12 of the oscillatory frame 0, as will be understood by reference to Figs. 1, 2, and 6 of the drawings, the axis of said shaft 18 being disposed in parallelism above and slightly in the rear of the axis of the shaft 15, which constitutes the axis of oscillation of the frame 0. The cylinder shaft 18 also constitutes a connection between and prevents spreading of the upper ends of the plates 10 and 12 of said frame, the outer ends of said shaft being provided with collars in a well-known manner.

The folding bed. or cylinder D, which is shown peripherally mutilated or recessed and of the same general construction as the cylinder in the patent referred to, will in practice be fixed to the shaft 18 between the side plates or brackets 10 and 12 of the frame 0 and has the usual'creaser-grooves in its periphery, said shaft having a normally progressive rotary movement imparted to it through the medium of the intermeshing gears 16 and 17 and the driving-shaft .15, hereinbefore referred to, the relative pitch diameters of said gears being preferably such as to efiect one "complete rotation of the cylinder to two rotations of the driving-gear 16.

As a convenient means for imparting oscillatory movements to the supplemental frame 0 and cylinder mounted thereon at predetermined points in the rotative movements of said cylinder, the outer end of the horizontally-disposed portion of each side plate or bracket 10 and 12 is shown provided with a roller or projection fitting a cam-groove 19 in a cam plate or disk 20, fixed to a shaft 21 said shaft being rotated through the medium of the gear 22, fixed to said shaft, and meshing with a gear 23, which in turn meshes in the construction shown in the drawings with the driving-gear 16 on the main shaft 15, the cam-groove being so disposed and timed as to impart two complete oscillations to the frame 0 and cylinder D at each complete rotation of said cylinder. a

It will be obvious that the construction of the cylinder-frame and' the. means for oscillating the cylinder may be variously modified without departure from this invention, it being assumed that where means are provided to impart two complete oscillations to the cylinder at each complete rotation thereof said cylinder will be constructed-to carry two bagblanks simultaneously.

The cam-groove 19 in the cam plate or disk 20 will in practice be soshaped as to cause the cylinder D to movebodily rearward in the are indicated by the dot-and-dash line dd in Figs. 1 and 6 the requisite distance to permit the tucker-plate, hereinafter described, to

clear the cylinder as it revolves on its axis from the position thereof shown in Fig. 12 to the position shown in Fig. '14, the two extreme positions of the cylinder-axis being indicated by dots a and bin Figs. 1 and 6. The continued rotation of the cam 20 returns thecylinder-axis to the positionindicated at a.

The tucked tube of proper bag length is fed bottom-forming end first to the bottomforming mechanism and which end is so guided (by any snitable nechanism) that it enters between the cylinder D and tuckerplate 25, the former of which is provided with the front clip 25 for engaging the lower ply of theadvanced end of the tube, andtwo oppositely-disposed side clips 28, engaging the side edges of the lower tuck, and the tuckerplate isprovided with side nippers 42, adapted for engaging the side edges of the upper tuck at the advanced end thereof. The position of the parts at this time is illustrated in Figs. 9 andlO. The rotation of the cylinder D is then continued, carrying the lower ply of the blank forward, while the-tucker-plate t is rotated upon its axis 33,.w-ith its lower edge clamping the bag-blank to the cylinder D. As a result of this the forward end of the bag-blank is spread open, substantially as H shown in Figs. 11 and 12.

At this stage it is necessary to impart an oscillatory movement to the rotating cylinderin order to allow the opening of the plies as required to complete the diamond fold to continue. This, as hereinbefore explained, is accomplished byswinging the arms 10, through'the instrumentality of a cam-plate 20 and groove 19, upon the axis 15, whereby the cylinder is swung away from the edge of the tucker-plate, allowing the parts to assume the position shown'in' Figs.

l3 and 14:. The movement of the tucker-plate has been continued during the oscillation of thecylinder, and during the continuation of the movement of the tuckerplate the cylinder (which continuously rotates) is oscillated back'to its original position and the diamond is completely opened, as shown in Figs. 15 and 16. a

The operation of the grippers 42 is so timed that at the'c'onclusion of the diam ondfold the said grippers will release the plies of the blank clamped to the tucker-plate and the blank will be carried forward, to be subsequently operated upon by-suitable device's-(such as pasting and folding devices) for completing the bottom of the-bag. y

The devices for operating the front clip may be of any suitable design. The devices for operating the clips 28 and grippers 42, hereinafter described, are shown in Figs. 3, 7, and 8. Inreissued Letters Patent No. 11,880, dated January 1,- 1901, I have shown and described a machine for forming bag-bottoms, and reference may be had thereto for a detailed description of means for operating the cylin drical folding-bed and many other parts of my;

present invention.

As in the reissued patent referred to, the folding bed or cylinder D is'shown provided with two front clips, (each designated by 25,)

'is fixedly supported in the path of' travel of the roller 26, and which cam has its working face constructed to impart a bag-releasing movement to the clip 25 at the requisite point in'the rotary movement'of the cylinder, and, asin the patent referred to, each front clip will be provided with aclip-advancing spring, (not shown,) so that when the roller 26 rides off the working face of'the fixed cam 27'the clip 25 will be automatically shifted to its bagengaging position, as will be readily understood by reference to Fig. 6 of the drawings.

The cylinderwill in practice be provided with two pairs of bevel-edged side clips, (one pair only of which is shown,) each pairbeing disposed in cooperative relation with a front clip and between said front clip and a creasergroove, as 18. These side clips are shown substantially of the same general construction and organization and maybe operated in the same manner as the side clipsof the machine described in the patent referred to.

These side clips (each of which is designed by 28) are pivotally mounted on brackets on the opposite sides, respectively, of the'cylinder and have pinion-sectors 28', one of the. sectors meshing with teeth on the upper face of a rack 29, supported for reciprocatory movements crosswise of the cylinder, andthe other of which meshes with the teeth on the under face of said rack, which rack has a depend ing stud or projection 30 extending into a cam-groove 31 in the periphery of a fixedlysupported plate or disk 32, the cam-groove3l 1 being constructed to impart engaging and disengaging movements to the side clips at the requisite points in the rotary movements of To compensate for wearand the cylinder. maintain the side clips in theirblank-engaging position, these clips willin practice be provided with advancing-springs,(not shown I which may be of the construction illustrated in the patent referred to.

Inasmuch as the specific construction and organization of the front clips and side clips in connection with the cylinder D do not constitute an essential part of the present invention, it is deemed unnecessary, in View of the reference to Patent No. 614,123, to illustrate these elementary features in detail.

The tucker-plate mechanism, which is designated in a general way by T, (hereinbefore referred to as a rotative device or element T,) comprises, essentially, in the preferred construction and organization thereof shown most clearly in Figs. 1, 3, 4:, and 5 a tuckerplate (designated in ageneral way by t) supported for rotary reciprocatory movements in advance of and in cooperative relation with the cylinder and two parallel-motion clips or upper-ply-engaging devices (designated in a general way byfand f, respectively) supported for rectilinear reciprocatory move- Inentsin cooperative relation with the tuckerplate at opposite sides, respectively, thereof, means, hereinafter described, for imparting rotary reciprocatory movements to the tucker'plate in proper timing with the oscillatory movements of the cylinder, and independent means, hereinafter described, for actuating the parallel'inotion devices.

The tucker-plate i (see Figs. 3, i, and 5) is shown as a flat plate secured to the slabbed portion 33' of a shaft 33, (one end of which shaft is axially recessed,) journaled at its ends in bearings 3i and 34: on the upper ends of the uprights 8 and 9 of the stationary frame B, and said tucker-plateis shown having on the rear face thereof above its axis of movement transversely-disposed bearings 35, which support the actuating-connector, as hereinafter described, between the two parallel-motion devices.

The actuating means for the tucker-plate comprises in the preferred form thereof shown most clearlyin Figs. 1 and 2 a pinion 36, fixed to one extreme end of the shaft 33, a vertical obliquely-disposed rack 37, meshing with the pinion 36 and having the lower end thereof slotted, as shown at 38 in dotted lines in Fig. 1, to straddle the main shaft 15, a roller 39, rotatably supported on the rack near the ,lower end thereof, as indicated in dotted lines in Fig. 1, a cam 40, (shown in dotted lines in Fig. 1 and in full lines in Fig. 2,) mounted on the shaft 15 and constructed to impart tucker-plate-advancing movements to the rack 37, and automatically-operative retractive means, shown as a spring 41, in connection with the lower end of the rack and adapted for automatically retracting the same, it being understood that the spring will in practice be secured (although it is not indicated in the drawings) to some fixed part of the bed of the machine.

The cam 40 and the actuating means be tween the cam and tucker-plate will be so constructed and so timed in their movements with respect to the cam, which imparts oscillatory movements to the cylinder, that the rotary reciprocatory movement of the tuckerplate and the oscillatory movements of said cylinder will take place substantially concnrrent1ythat is to say, the tucker-plate will have a rotary advancing movement concurrently with the bodily movement of the cylinder away from and toward the tuckerplate and will be returned to its normal position when the cylinder shall have so far revolved as to bring a mutilation of the cylinder in front of the tucker-plate.

From the foregoing it will be seen that the tucker-plate has an advancing movement imparted to it through the medium of the pinion 36, rack 37, and cam 40 direct from the main shaft of the machine and that it is antomatically retracted by means of the spring 41. The slot 38 in the lower end-of the rack 37 will be so constructed and disposed that the upper wall thereof will constitute an abutment for limiting the retractive movement of said rack. This construction and organization of the actuating means for the tuckerplate has obvious advantages and cheapness in cost of construction over the tucker-plateactuating means in other paper-bag machines; but it will be obvious that the invention is not limited to specific construction and organization of tucker-plate-actuat-ing means shown in the accompanying drawings, as the same may be modified within certain limits without departure from the invention.

1n the preferred construction and organization thereof (shown most clearly in Figs. 3, 4, and 5) each parallel-motion clip or upperply-engaging devicefandf com prises, essentially, a bevel-edged clip member 42, supported one at each side of the tucker-plate in parallelism with the axis of movement of said plate to be shifted from the normal dottedline position in Fig. 3 to the full-line or upper-ply-engaging position shown in said figure, and two parallel links 43 and let, pivotally connected at their upper ends to the clip member 42 and pivotally connected at their lower ends to the slabbed or flattened end portion 33 of the shaft 33 of the tucker-plate, which slabbed portion 33 is rectangularly disposed with reference to the slabbed portion 33, to which the said tucker-plate is secured, the distances between centers or axes of movement of both links being the same, so that the longitudinal axis of the clip member 42 will at all times be in parallelism with the axis of motion of the tucker-plate and also in parallelism with the blank-supporting face of the tucker-plate.

As a simple and convenient means for operating the two parallel-motion devices f and f together and in relatively opposing directions there is provided an actuating-connector between the front links of the two devices, which connector is shown as a two-part bar 45, supported for reciprocatory movements in the bearings 35 on the rear face of the tuckerplate, the two inner ends of the two members of the bar being adjustably connected together, as indicated in dotted lines in Fig. 3, and this bar has at one end thereof a shiftable pivotal connection, as 46, with the front link of the parallel-motion device f between the two pivotal points of said link, and has at the other end thereof a shiftable pivotal connection, as 47, with the front link of the para1lel-motion device f below the point where said link is connected to the slabbed portion 33. In other words, the bar 45 is pivotally connected at one end to the front link of one device, as f, above the axis of oscillation of said link, and is pivotally connected at its opposite end to the front link of the other device, as f, below the axis of oscillation of said link, so that upon a reciprocatory movement of the bar 45 in one direction both clip members 42 will be retracted to the dotted-line position in Fig. 3 in parallel lines, and upon opposite reciprocatory movement of said bar said clip members will be advanced in parallel lines to the full-line position in Fig. 3. This barf hasa pin 49 at one end thereof, which extends through an elongated slot 50 in the hollow end of the shaft 33 and is connected to a reciprocatory actuator 51, mounted in said shaft, which actuator is provided at the extreme end thereof with a peripherally-grooved collar 52, which is engaged by pins on the bifurcated end 53 of a lever 54, which is fulcrumed at 55 upon a bracket 56, secured to the upright 9, and

which lever is provided at the lower end thereof with a roller 57 (shown in dotted lines in Fig. 1 and in full lines in Fig. 2) in hearing engagement with the working face 58 of a cam 59, secured to the main'shaft 15, and whereby movement in one direction is imparted to the actuator 51, the connector 45, and the parallel-motion devices f and f.

As a convenient means for automatically imparting blank-engaging movements to the parallel-motion devices f and f I have provided an automatically-operative clip-memberadvancing device, which in the form thereof shown consists of a spiral spring 60, fixed at one end to a bracket 61 on the upright 9 and at its opposite end to a pin 62 on the upper end of the lever 54, as shown most clearly in Fig. 2. This clip-advancing means not only acts to impart automatically advancing movements to the clip members 42 of the two parallel-motion devices f and f, but also insures a yielding engagement between said members and the upper ply of the bag-blank, conforms to inequalities in thickness in paper, and also compensates for Wear.

It is distinctly to be understood that the invention is not limited to the specific construction and organization of the parallelmotion upper-ply-engaging devices in'connection with the tucker-plate or the actuating means therefor, as these may be modified without limit so long' as the novel characteristics in mode of operation are adhered to.

As in the patent referred to and in the reissue thereof, the machine is provided with feed-rolls 63 and 64 for feeding the blank between the tucker-plate and cylinder, which rolls have shafts journaled in hearings on the stationary frame and are driven by intermeshing gears 65 and 66, the latter of which meshes with a gear 66, (see Fig. 2,) fixed to the driving-shaft 15.

The operation of the diamond forming mechanism, which constitutes the essence of the present invention,is as follows: The bottom-forming end of the paper tube P (see Figs. 9 to 13, inclusive,) is guided by the feedrolls 63 and 64 between the two relatively rotative members D and T of the diamondforming mechanism. The tube as it arrives at about the position shown in Figs. 9 and 10 has the lower ply thereofengaged by the front clip 25 and the two side clips 28 on the cylinder, which holds the lower fold of the blank to the cylinder. The two clip members 42 of the parallel-motion devices f and f are then caused to close with relation to the tuckerplate 25 and engage the upper ply of said tube, after which the tucker-plate has a r0- tary advancing movement imparted thereto and the cylinder is concurrently oscillated away from the tucker-plate, causing said tucker-plate to form the primary transverse folding-line in the tubular blank, as indicated in Fig. 12, the continued movements of the tucker-plate and cylinder in opposing directions then causing the bottom-forming end of the tube to be opened and refolded into diamond form, as indicated in Figs. 13- to 16, inclusive, after which the parallel-motion clips will be released and the blank carried around with the cylinder, to be. subsequently operated upon by the complemental bottom-forming instrumentalities. (Not shown.)

I claim 1. In a paper-bag machine, a tucker-plate, gripping devices carried by said plate, a pair of parallel links, each connected at the one end to the tucker-plate, and at the other end, to a gripping device, a connection between the gripping devices, a reciprocatory rod connected to one pair of links, and means for reciprocating said rod, substantially as and for the purpose described.

2. In apaper-bag machine, an oscillatory tucker-plate secured to an oscillating rod, means for oscillating said rod, gripping devices carried by said tucker-plate, a reciprocatory rod and connections for imparting motion to the gripping device in unison, said reciprocatoryrod fitted within the oscillating rod, and means for operating the reciprocatory rod, substantially as and for the purpose described.

3. In a paper-bag machine, a tucker-plate; gripping devices carried by said plate, each said gripping device havinga clamping memher; a pair of links connecting each clamping member with the tucker-plate, for imparting rising-and-falling motions bodily to and from the plate; and connections for operating both pairs oflinks in unison, substantially as described.

4:. In a paper-bag machine, a tucker-plate; gripping devices carried by said plate, each said gripping device having a clamping mem ber, parallehnotion devices connecting each '5 Signed by me at Hartford, Connecticut, this 25th day of October, A. D. 1900.

GEORGE MORTSON.

WVitnesses:

E. O. WHITNEY, L. 0. W001). 

